I have been told the 14000k PL tubes are not as bright as the 8000k, The leds I am going to use are about 150,000mcd and I think I have room for about 20, hopefully that will be plenty.
I will keep an eye on the impellor shaft.
I did also wonder about the eheim being to direct. I will look into a small wave pump.
The temp is a concern but this is the hottest time of year so I will see how it goes over the next couple of weeks, But I am prepared to fit a fan if needed. The temp has only raised 1 degree during the day so far.
I will raise the salinity this weekend and yes the hydrometer is quite hard to read.
Thanks for the advice